Functional Roles
Industries Served
Physical Properties
physical_description
Liquid
color/form
Clear, siloxane fluid
odor
Odorless
boiling_point
245 u00b0C
melting_point
-3 u00b0C
flash_point
91 u00b0C (196 u00b0F) - closed cup
solubility
In water, 0.0051 mg/L at 23 u00b0C
density
0.9672 g/cu cm at 25 u00b0C
vapor_pressure
0.0169 mm Hg at 25 u00b0C
logp
log Kow = 8.87
henry's_law_constant
Henry's Law constant = 25.0 atm-cu m/mole at 25 u00b0C
stability/shelf_life
Stable under recommended storage conditions.
viscosity
6.62 cSt
heat_of_vaporization
Enthalpy of vaporization: 56.1 to 62.6 kJ/mol
surface_tension
19.2 mN/m at 20 u00b0C; 18.8 mN/m at 25 u00b0C
refractive_index
Index of refraction = 1.4015 at 20 u00b0C
kovats_retention_index
1349.9
other_experimental_properties
Molar volume = 436.8 cu cm/mol at 23 u00b0C
GHS / SDS Safety
Warning
- H413 (12.9%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]
- H227: Combustible liquid [Warning Flammable liquids]
Chemical Identity
| CAS Number | 540-97-6 |
| IUPAC Name | 2,2,4,4,6,6,8,8,10,10,12,12-dodecamethyl-1,3,5,7,9,11-hexaoxa-2,4,6,8,10,12-hexasilacyclododecane |
| InChI Key | IUMSDRXLFWAGNT-UHFFFAOYSA-N |
| PubChem CID | 10911 |
| INCI Name | CYCLOMETHICONE |
Synonyms & Trade Names
Full Description
Cyclohexasiloxane (D6) is a cyclic silicone fluid that provides emolliency, lubrication, and slip & leveling properties in formulated products. This siloxane compound finds primary application across beauty & personal care, coatings & construction, industrial manufacturing, plastics & polymers, and textile industries where its molecular structure (C12H36O6Si6) delivers consistent performance characteristics. With a boiling point of 245°C and flash point of 91°C, D6 offers thermal stability suitable for various processing conditions.